On Mon, Oct 23, 2006 at 11:19:13PM +0530, sumit kumar wrote: > Hello , > does anybody help me out telling how the PostGRESQL estimates > cardinality of LIKE operator. Try asking on pgsql-hackers... (sorry, I don't know the answer myself). -- Jim Nasby jim@xxxxxxxxx EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)